Question

A plant virus having $DNA$ is

• A. $TMV$
• B. Cauliflower Mosaic Virus
• C. Potato Mosaic Virus
• D. Both B and C

Answer 1

The correct option is B Cauliflower Mosaic Virus

Cauliflower mosaic virus contains a circular double-stranded DNA molecule which is of about 8.0 kilobases. This DNA molecule contains nicks that result from the actions of RNase H during reverse transcription. After entering the host cell these single-stranded nicks in the viral DNA are repaired and forms a supercoiled molecule. Tobacco mosaic virus is a positive sense single-stranded RNA virus. Both TMV and Potato mosaic virus is a single-stranded RNA virus. So the correct answer is 'Cauliflower Mosaic Virus'.